Kleinlein, Walter John, 1876- [from old catalog] · [Boston, Hooper printing co.] · leaf 118
eration is concentrated within the firstquarter of the coil from its point of attachment andit is seldom ever necessary to make any bendsbeyond the first eighth of the coil from the attachedpoint. Figure 28 may be of some value in gaining anidea as to just how this inner coil should appearwhen it… … Fig. 28 The outer black line shows the most adaptableform for most instances. The inner black lineshows the most practical form for use in instanceswhere there is unusual space between the colletand the inner coil. It will be noted that these twoforms blend into the true spiral form of the springat…
Clocks and watches
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